An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 5985-01-228-8900
NSN 6150-01-581-8775
NSN 7035-01-028-4966
NSN 5920-01-128-3572
NSN 5999-01-392-1103
NSN 5960-01-619-9361
NSN 6220-01-381-6830
NSN 5910-00-484-7985
NSN 6610-00-377-7956
NSN 5950-00-461-2550
NSN 5960-01-122-1101
NSN 5960-01-247-1994